Javascript array of dates - not iterating properly (jquery ui datepicker)

I have some code which builds an array of date ranges. I then call a function (from the jquery UI datepicker), passing it a date, and compare that date with dates in the array. I'm doing it this way because the dates are stored in a cms and this is the only way I can output them.

Unfortunately my code only checks the first date range in the array - and I can't figure out why! I think it's probably something simple (/stupid!) - if anyone can shed some light on it I'd be extremely grateful!

The code is below - the june-september range (ps1-pe1) works fine, the december to jan is totally ignored...

<script type="text/javascript" language="javascript"> 

var ps1 = new Date(2010, 06-1, 18); // range1 start
var pe1 = new Date(2010, 09-1, 03); // range1 end
var ps2 = new Date(2010, 12-1, 20); // range2 start
var pe2 = new Date(2011, 01-1, 02); // range2 end

var peakStart = new Arra开发者_JS百科y(ps1,ps2);
var peakEnd = new Array(pe1,pe2);
function checkDay(date) {
    var day = date.getDay();
    for (var i=0; i<peakStart.length; i++) {
        if ((date > peakStart[i]) && (date < peakEnd[i])) {
            return [(day == 5), ''];
        } else {
            return [(day == 1 || day == 5), ''];
        }
    }
}
</script>

Yaggo is quite right, but apparently too terse.

You want to move the second return statement outside of the loop.

function checkDay(date) {
    var day = date.getDay();
    for (var i=0; i<peakStart.length; i++) {
        if ((date > peakStart[i]) && (date < peakEnd[i])) {
            return [(day == 5), ''];
        }
    }
    // it's not during a peak period
    return [(day == 1 || day == 5), ''];
}

You always call return in the first iteration of for loop.